I say, look around a bit, watch some youtube videos, click a bit around though the menu’s and experement with functions. Combine that with reading parts of the documentation and searching this forum (most of the obvious questions have been answered 10 times over).
For beginners I recommend to do some “test” projects with about 10 to 20 parts. With simpler projects some parts (such as the routing) are too trivial to learn from, while with more complicated projects it takes much more time to correct mistakes. You also learn quicker from a bunch of small projects then from a single big project.
And of course, after you’ve gained some experience and grown some confidence you can take on more complicated projects.